1/*
2 * Mostly IRQ support for Hexagon
3 *
4 * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 and
8 * only version 2 as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18 * 02110-1301, USA.
19 */
20
21#include <linux/kernel.h>
22#include <asm/registers.h>
23#include <linux/irq.h>
24#include <linux/hardirq.h>
25
26/*
27 * show_regs - print pt_regs structure
28 * @regs: pointer to pt_regs
29 *
30 * To-do:  add all the accessor definitions to registers.h
31 *
32 * Will make this routine a lot easier to write.
33 */
34void show_regs(struct pt_regs *regs)
35{
36	show_regs_print_info(KERN_EMERG);
37
38	printk(KERN_EMERG "restart_r0: \t0x%08lx   syscall_nr: %ld\n",
39	       regs->restart_r0, regs->syscall_nr);
40	printk(KERN_EMERG "preds: \t\t0x%08lx\n", regs->preds);
41	printk(KERN_EMERG "lc0: \t0x%08lx   sa0: 0x%08lx   m0:  0x%08lx\n",
42	       regs->lc0, regs->sa0, regs->m0);
43	printk(KERN_EMERG "lc1: \t0x%08lx   sa1: 0x%08lx   m1:  0x%08lx\n",
44	       regs->lc1, regs->sa1, regs->m1);
45	printk(KERN_EMERG "gp: \t0x%08lx   ugp: 0x%08lx   usr: 0x%08lx\n",
46	       regs->gp, regs->ugp, regs->usr);
47	printk(KERN_EMERG "cs0: \t0x%08lx   cs1: 0x%08lx\n",
48	       regs->cs0, regs->cs1);
49	printk(KERN_EMERG "r0: \t0x%08lx %08lx %08lx %08lx\n", regs->r00,
50		regs->r01,
51		regs->r02,
52		regs->r03);
53	printk(KERN_EMERG "r4:  \t0x%08lx %08lx %08lx %08lx\n", regs->r04,
54		regs->r05,
55		regs->r06,
56		regs->r07);
57	printk(KERN_EMERG "r8:  \t0x%08lx %08lx %08lx %08lx\n", regs->r08,
58		regs->r09,
59		regs->r10,
60		regs->r11);
61	printk(KERN_EMERG "r12: \t0x%08lx %08lx %08lx %08lx\n", regs->r12,
62		regs->r13,
63		regs->r14,
64		regs->r15);
65	printk(KERN_EMERG "r16: \t0x%08lx %08lx %08lx %08lx\n", regs->r16,
66		regs->r17,
67		regs->r18,
68		regs->r19);
69	printk(KERN_EMERG "r20: \t0x%08lx %08lx %08lx %08lx\n", regs->r20,
70		regs->r21,
71		regs->r22,
72		regs->r23);
73	printk(KERN_EMERG "r24: \t0x%08lx %08lx %08lx %08lx\n", regs->r24,
74		regs->r25,
75		regs->r26,
76		regs->r27);
77	printk(KERN_EMERG "r28: \t0x%08lx %08lx %08lx %08lx\n", regs->r28,
78		regs->r29,
79		regs->r30,
80		regs->r31);
81
82	printk(KERN_EMERG "elr: \t0x%08lx   cause: 0x%08lx   user_mode: %d\n",
83		pt_elr(regs), pt_cause(regs), user_mode(regs));
84	printk(KERN_EMERG "psp: \t0x%08lx   badva: 0x%08lx   int_enabled: %d\n",
85		pt_psp(regs), pt_badva(regs), ints_enabled(regs));
86}
87
88void dummy_handler(struct pt_regs *regs)
89{
90	unsigned int elr = pt_elr(regs);
91	printk(KERN_ERR "Unimplemented handler; ELR=0x%08x\n", elr);
92}
93
94
95void arch_do_IRQ(struct pt_regs *regs)
96{
97	int irq = pt_cause(regs);
98	struct pt_regs *old_regs = set_irq_regs(regs);
99
100	irq_enter();
101	generic_handle_irq(irq);
102	irq_exit();
103	set_irq_regs(old_regs);
104}
105